JPH04329133A - Preparation of metal curtain wall and strip like material used therein - Google Patents

Abstract

PURPOSE:To simply prepare a metal curtain wall having no fault. CONSTITUTION:In preparing a metal curtain wall by bonding a plate member 3 and a profile long extrusion member 1, a strip like material composed a of unvulacnized silicone rubber with a degree of plasticity of 150-500 is bonded to the bonding surface of one of the members and the other member is superposed on the strip like material to be bonded thereto under pressure and the bonded one is heat-treated.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a metal curtain wall and a strip used therein. As the metal curtain wall to which the present invention is directed, aluminum curtain walls are currently the mainstream in Japan, and will be described below. The main components are an aluminum plate (JIS H 4000 aluminum alloy plate) and an aluminum profile (JIS H 4100 aluminum alloy extruded profile). An aluminum frame is joined to the outer periphery of an aluminum plate to form a unit. In addition, to improve durability, corrosion resistance, and weather resistance, the surface of each aluminum member is treated with an anodic oxide film, a painted composite film on the anodic oxide film, or a coating with acrylic resin. ing.

0002

[Prior Art] In the conventional manufacturing of metal curtain walls, a silicone sealant with a cartridge is used to join aluminum sheets (plate members) and aluminum profiles (long extruded members, usually irregularly shaped long extruded members). It's here. In this method, since the sealant is extruded from the cartridge onto the joint surfaces of the two members, air bubbles are likely to enter during the process, and professional skills are required. Moreover, if the adhesive layer is thick,
Backup materials, masking tape, etc. are required. Moreover, since this sealant is mainly of the type that cures at room temperature, it requires a curing period of 1 to 2 weeks, which causes problems such as delay in construction period.

[0003] In recent years, the labor shortage has spread to all industrial fields, and it has become increasingly difficult to secure particularly skilled craftsmen. Therefore, it is becoming impossible to manufacture metal curtain walls that require skill, and it is becoming impossible to manufacture metal curtain walls that require simple and effective methods. It was hoped that a new manufacturing method would emerge.

0004

[Problems to be Solved by the Invention] In view of the above-mentioned circumstances, the present invention provides a method for manufacturing a metal curtain wall that is simple, hassle-free, and has excellent airtightness and waterproofness, and a method used therein. There are some things that have been done to provide strips.

[0005]

[Means for Solving the Problems] The present invention has solved the above-mentioned problems, and in manufacturing a metal curtain wall by joining a plate member and an extruded member,
Plasticity 15, preferably covered on both sides with a release film
A strip of unvulcanized silicone rubber with a grade of 0 to 500 is pasted to the joint surface of one member, peeling off the film as necessary, and another member is stacked on top of this and pressure-bonded, followed by heat treatment. The main points of this paper are the manufacturing method of metal curtain walls and the strips used therein.

[0006] In order to solve the above problems, the present inventors
As a result of extensive research into materials to replace silicone sealants, the present invention was completed after discovering that a strip of unvulcanized silicone rubber is suitable for this purpose.

The present invention will be explained in detail below. The silicone rubber used for the unvulcanized silicone rubber strip used in the present invention is as follows. It becomes a rubber-like elastic body through radical reaction crosslinking using an organic peroxide, and is cured by so-called addition reaction crosslinking, in which organohydrogenpolysiloxane and a curing catalyst for addition reaction curing, such as a platinum-based catalyst, are added. It can be any of the following, which is an average unit expression,

[0008]

[Chemical formula 1]

##STR1## where a=1.90-2.05 and R is an alkyl group such as methyl group, ethyl group, propyl group, butyl group, alkenyl group such as vinyl group, allyl group, phenyl group, tolyl group, etc. Chloromethyl groups in which part or all of the hydrogen atoms bonded to the carbon atoms of these groups are substituted with halogen atoms, cyano groups, etc.
, 3,3-trifluoropropyl group, cyanomethyl group, etc., preferably 80 mol% of which is a methyl group, and 0.1 to 0.5 An organopolysiloxane in which mol% is vinyl group, preferably having a viscosity of 100 at 25°C.
Any material based on cs or more, preferably 1000cs or more may be used. Note that the terminals of the present organopolysiloxane are preferably capped with silanol groups, methyl groups, or vinyl groups, particularly those capped with vinyl groups.

[0010] This silicone rubber composition is generally one in which a silica-based filler is blended with the above-mentioned organopolysiloxane, and the filler includes fumed silica,
Representative examples include precipitated silica, quartz powder, and diatomaceous earth, which have a particle size of 50 μm.
The following may be used, and the amount added may range from 20 to 200 parts by weight per 100 parts by weight of the organopolysiloxane. The composition may also contain a silane or low-molecular siloxane containing an alkoxy group, a silanol group, etc. as a silica dispersant, or an inorganic pigment for coloring.

[0011] This silicone rubber composition can be heat-cured by radical crosslinking in the presence of an organic peroxide, and examples of the organic peroxide include benzoyl peroxide, 2,4-dichlorobenzoyl peroxide, orthochlorobenzoyl peroxide. Examples include benzoyl peroxide, di-t-butyl peroxide, dicumyl peroxide, and 2,5-bis(t-butyl peroxide)-2,5-dimethylhexane. The silicone rubber composition may also be of an addition reaction type, in which case an organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms in the molecule and a platinum catalyst (chloroplatinic acid, chloride Platinic acid and alcohol, ether,
complex salts with aldehydes, olefins, vinyl siloxanes, etc.) are added to silicone rubber compositions.
What is necessary is just to add in the range of 100 ppm. Examples of the organohydrogenpolysiloxane include compounds 1 to 7.

0012

[Case 2]

[0013]

[Chemical formula 3]

[0014]

[C4]

[0015]

[C5]

[0016]

[C6]

[0017]

[C7]

[0018]

[Chemical formula 8]

The amount added is ≡SiH/≡Si(CH=CH2
)=0.5 to 5.0 (molar ratio). (In the formula, m, n, and p represent positive integers.)

002
Furthermore, a sponge rubber obtained by adding a blowing agent such as azobis-iso-butyronitrile to the silicone rubber composition can be used. It is necessary that the plasticity of the unvulcanized silicone rubber band is from 150 to 500; if it is out of this range, physical properties such as formability and compression set tend to deteriorate. The width and thickness of the strip are determined by the length, width and length of the extruded member to be joined to the plate member and are shaped in advance. It is preferable that the strip is protected from the outside world by being covered with a release film made of polyethylene terephthalate, polycarbonate, polyvinyl chloride, etc. on both sides, and when used, the film is peeled off and the exposed unvulcanized silicone is removed. Rubber is pasted on a specified joint surface, and other members are placed on top of it to apply a load. The cross-sectional shape of the strip is appropriately selected depending on the shape of the part to be pasted, such as L-shape, square-shape, I-shape, etc.

Specifically, first, on the joining surface of one member,
A strip of unvulcanized silicone rubber is pasted, and other members are stacked on top of it to give a weight of 0.5 to 3 kg/cm2, preferably 0.2 kg/cm2.
Crimp with a load of ~1 kg/cm2, then release the crimp as necessary (to prevent the silicone rubber from flowing out during vulcanization), and then vulcanize in a heating furnace, or Heat vulcanization using a hot press. In this case, the temperature is 150° C. for 60 minutes for sufficient curing.

In this case, it is preferable to treat the adhesive surface of the member with a primer in advance. Examples of the primer include a liquid composition containing a film forming agent such as siloxane, a silane coupling agent, a solvent such as toluene and trichlorethylene, and necessary amounts of catalyst, pigment, and other additives. Note that the above-mentioned treatment can also be omitted by incorporating a primer into the unvulcanized silicone in advance.

The composition of the primer is as follows. Alkoxylan
5
0-200 parts methylvinylpolysiloxane
5
0-200 parts methylvinylsiloxane

50-100 parts methylphenylsiloxane resin
2
0 to 50 parts Fumedrishka

20-30 parts dicumyl peroxide

2 to 5 parts tin dilaurate
10-20 parts organic solvent

It is a liquid material consisting of 1000 parts, and the following sample 1 is used as an example.

Sample 1: 100 parts of methylvinylpolysiloxane, 60 parts of methylvinylsiloxane containing 0.1 vinyl group bonded to a silicon atom and having a viscosity of 500 cs, and 30 moles of methylsiloxane units. %, dimethylsiloxane unit 30 mol%, phenylsiloxane unit 35 mol%
and 35 parts of methylphenylsiloxane resin with a silanol group content of 0.12 mol/100 g, consisting of 5 mol% of diphenylsiloxane units, 100 parts of vinyltris(2-methoxyethoxy)silane, and a specific surface area of 200 m
2/g of fumed silica, 4 parts of dicumyl peroxide, 15 parts of tin dilaurate, 800 parts of toluene.
250 parts of trichlorethylene and 150 parts of isopropanol and mixed uniformly to prepare a primer composition. In addition to this, another type is

Sample 2 Consisting of 99.6 mol% dimethylsiloxane units and 0.4 mol% vinylmethylsiloxane units, with a viscosity of 5.0
00,000 cs (5 million cs) of methylvinyl polysiloxane, the silanol group content is 0.05 mol, consisting of 43 mol% of dimethylsiloxane units, 50 mol% of methylsiloxane units, and 7 mol% of methylvinylsiloxane units. /100 g of methylvinylpolysiloxane resin, 50 parts of vinyltris(t-butylperoxy)silane, 25 parts of fumed silica with a specific surface area of 200 m2 /g, 1 part of tetrabutyl titanate, 800 parts of toluene and 200 parts of n-hexane. add part,
There are primer compositions that can be mixed uniformly, and other types.

Sample 3 The silazane bond-containing organosilicon polymer, which is the main component of the primer composition, has the general formula:

[0027]

[Chemical formula 9]

[0028] The concentration may be 0.1 to 10% by weight, and the concentration may be higher if necessary, and this solvent is not particularly limited. It's not something you can do. This R' is a hydrogen atom, an alkyl group such as a methyl group, an ethyl group, a propyl group, a butyl group, an aryl group such as a phenyl group or a tolyl group, a cycloalkyl group such as a cyclohexyl group, or a carbon atom of these groups. A chloromethyl group in which part or all of the bonded hydrogen atoms are substituted with a halogen atom, a cyano group, etc., 3
, 3,3-trifluoropropyl group, cyanomethyl group, etc.
Although they are valence hydrocarbons, it is essential that at least one of them is an unsaturated group, and this X is an atom or group selected from an oxygen atom, an imide group, an alkylene group, and a phenylene group, It is essential that 10% or more of them be imide groups, and this a is within 1.8 on average, preferably in the range of 0.8 to 1.5.

The size of the strip used is, for example, a sheet with a thickness of 8 mm and a width of 15 mm, or a sheet with a thickness of 10 m.
The thick sheet has a width of 12 mm and a width of 12 mm, but is not limited to this. According to the above method, unlike the case of using conventional silicone sealants, no skill is required to join the members, and the work can be completed quickly without a curing period, so productivity can be improved.

Examples of the present invention will be given below and compared with the conventional method.

[Example] As shown in FIG. 1, when joining an irregularly shaped elongated aluminum extruded member 1 and an aluminum plate member 3, each joint surface was treated with a primer (not shown) using the sample 1, Next, a strip 2 of unvulcanized silicone rubber with a plasticity of 300, which has been shaped in advance to have a thickness of 8 mm and a width of 15 mm, is pasted onto the irregularly shaped elongated extruded member 1, and this is attached to a plate member with a thickness of 3 mm. 3 and 0.
After pressure bonding at 5 kg/cm2, it was heated at 150°C for 60 minutes. The bonding strength of this bonded body is determined according to JIS A 5758 "
When tested using the test method for "Architectural Sealants",
38 kg/cm2 was obtained.

The band-shaped body 2 has the following composition. That is, the molecular chain terminal is (CH2 = CH) (C
H3 ) 2 SiO0.5 blocked (CH3 )
2 SiO units 99.8 mol%, (CH3)(CH2
=CH3 SiO
40 parts of fumed silica with an average particle size of 15 μm that was surface-treated with 0.5 units, the molecular chain terminals were blocked with silanol groups,

[0032]

[Chemical formula 10]

This is a silicone rubber compound obtained by kneading 10 parts of dimethylpolysiloxane represented by the following formula, to which 0.75 parts of a vulcanizing agent, orthomonochlorobenzoyl peroxide, is added.

[0034]

[Comparative Example] As shown in FIG. 2, a backup material 5 of foamed ethylene with an adhesive is brought into close contact with an extruded aluminum member 1 and set on an aluminum plate member 3. Next, apply masking tape (not shown), apply the primer of sample 2 to the adhesive surface, dry it, fill it with structural silicone sealant, being careful not to introduce any air bubbles, finish it with a spatula, and mask it. The tape was removed and the sample was cured at room temperature for two weeks. When the bonding strength of this structural silicone sealant was tested using the same method as in Example 1, it was found to be 7.
~12 kg/cm2.

[0035]

[Effects of the Invention] According to the present invention, ■ Since the work is as simple as attaching a strip of unvulcanized silicone rubber of a predetermined size to the joining member, no craftsmanship skills are required; There are no bubbles. ■ It hardens sufficiently in a heating oven or hot press at 150°C for 60 minutes, so there is no need for a curing period. ■ Crimping force during crimping is 0.2 to 1
．． 0 kg/cm2 is sufficient.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the curtain wall manufacturing method of the present invention.

FIG. 2 is an explanatory diagram of a conventional curtain wall manufacturing method.

[Explanation of symbols]

1 Irregular long extruded member 4
Silicone sealant 2 Silicone strip
5 Backup material 3 Plate member

Claims (3)

[Claims] [Claim 1] When manufacturing a metal curtain wall by joining a plate member and an extruded member, the plasticity is 1.
1. A method for manufacturing a metal curtain wall, which comprises: pasting 50 to 500 strips of unvulcanized silicone rubber on the bonding surface of one member, overlapping another member thereon, pressing it together, and heat-treating it. [Claim 2] In manufacturing a metal curtain wall by joining the plate member and the irregularly shaped elongated extruded member,
A strip of unvulcanized silicone rubber with a plasticity of 150 to 500, both sides covered with a release film, is attached to the bonding surface of one member while peeling off the film, and another member is stacked and crimped onto this. A method for manufacturing a metal curtain wall, which is characterized in that the metal curtain wall is then subjected to heat treatment. 3. A band-shaped body used in the method for manufacturing a metal curtain wall according to claim 2.